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feat: Increase secret size to 256 bits of entropy

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This is for quantumn computers. When trying to break AES, quantumn
computers give a square-root speedup, i.e. the 144 bits of entropy would
take as many queries as breaking 72 bits of entropy on a normal computer. This neglects
e.g. the costs of quantumn circuits and quantumn error correction [1], so,
144 bits entropy would actually have been fine, but in order to be on
the very safe side and so that noone can complain, let's increase it to
256 bits.

[1]: https://csrc.nist.gov/csrc/media/Events/2024/fifth-pqc-standardization-conference/documents/papers/on-practical-cost-of-grover.pdf
This commit is contained in:
Hocuri
2025-08-04 17:17:49 +02:00
parent 13bbcbeb0e
commit 494ad63a73
4 changed files with 32 additions and 8 deletions
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8
src/chat.rs
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@@ -43,9 +43,9 @@ use crate::smtp::send_msg_to_smtp;
use crate::stock_str;
use crate::sync::{self, Sync::*, SyncData};
use crate::tools::{
IsNoneOrEmpty, SystemTime, buf_compress, create_id, create_outgoing_rfc724_mid,
create_smeared_timestamp, create_smeared_timestamps, get_abs_path, gm2local_offset,
smeared_time, time, truncate_msg_text,
IsNoneOrEmpty, SystemTime, buf_compress, create_broadcast_shared_secret, create_id,
create_outgoing_rfc724_mid, create_smeared_timestamp, create_smeared_timestamps, get_abs_path,
gm2local_offset, smeared_time, time, truncate_msg_text,
};
use crate::webxdc::StatusUpdateSerial;
use crate::{chatlist_events, imap};
@@ -3794,7 +3794,7 @@ pub async fn create_group_ex(
/// Returns the created chat's id.
pub async fn create_broadcast(context: &Context, chat_name: String) -> Result<ChatId> {
let grpid = create_id();
let secret = create_id();
let secret = create_broadcast_shared_secret();
create_broadcast_ex(context, Sync, grpid, chat_name, secret).await
}